For Avon, think Afon, itself ‘river’
flowing from the source in Brythonic Abona
For Severn, think Sæfern, and before that Sabrina
Brythonic ‘flowing’ is heard in Thames, Tavy,
These speak of a common spring far back, streams
of the land, sources that leak silver ore
through the valleys of Ynys Prydain.
of rock and soil, dark waters with names like this:
from Dubglas, source of all Blackwater streams,
And so to Dee / Dyfrdwy, the Goddess Dēuā,
Aerfen’s waters, Tegid’s lake, Ceridwen’s cauldron.